troop vs flock

troop and flock both are nouns.

Word	Noun	Adjective	Verb	Adverb
troop	Yes	No	Yes	No
flock	Yes	No	Yes	No

As nouns, troop and flock are synonyms defined as:

troop (noun)	flock (noun)
a group of soldiers	a group of birds
an orderly crowd	a group of sheep or goats
a unit of Girl or Boy Scouts	a church congregation guided by a pastor
a cavalry unit corresponding to an infantry company	an orderly crowd
	(often followed by `of') a large number or amount or extent

troop (verb)	flock (verb)
move or march as if in a crowd	come together as in a cluster or flock
march in a procession in a public place	move as a crowd or in a group